Home / 81,590.12-122,370.62-51,919.88

Finding the Fourth Proportional to 81,590.12, 122,370.62 and 51,919.88

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Solution

The fourth proportional to 81,590.12, 122,370.62 and 51,919.88 is: 77,870.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,590.12 : 122,370.62 = 51,919.88 : x
  2. Step 2: Convert to fraction form
    81,590.12/122,370.62 = 51,919.88/x
  3. Step 3: Cross multiply
    81,590.12x = 122,370.62 × 51,919.88
  4. Step 4: Simplify right side
    81,590.12x = 6,353,467,905.93
  5. Step 5: Solve for x
    x = 6,353,467,905.93/81,590.12
  6. Step 6: Final answer
    x = 77,870.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.